Insulation block



FIG. 1 is a top perspective view of the insulation block;

FIG. 2 is another top perspective view thereof;

FIG. 3 is left side view thereof;

FIG. 4 is a right side view thereof;

FIG. 5 is a bottom perspective view thereof;

FIG. 6 is another bottom perspective view thereof;

FIG. 7 is a front view thereof;

FIG. 8 is a top view thereof; and,

FIG. 9 is a bottom view thereof. 

CLAIM The ornamental design for an insulation block, as shown and described. 